Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size
Atlantic cod (Gadus morhua) is among the most important commercial fish species on the world market. Its infection by ascaridoid nematodes has long been known, Pseudoterranova even being named cod worm. In the present study, 755 individuals were sampled in the Barents, Baltic and North Seas during 2...
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2018
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Online Access: | https://curis.ku.dk/portal/da/publications/infection-levels-and-species-diversity-of-ascaridoid-nematodes-in-atlantic-cod-gadus-morhua-are-correlated-with-geographic-area-and-fish-size(20623cec-31b1-4d5b-a6e1-5c58dd0a2ab2).html https://doi.org/10.1016/j.fishres.2017.06.006 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/20623cec-31b1-4d5b-a6e1-5c58dd0a2ab2 2024-06-09T07:44:39+00:00 Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size Gay, M. Bao, M. MacKenzie, K. Pascual, S. Buchmann, K. Bourgau, O. Couvreur, C. Mattiucci, S. Paoletti, M. Hastie, L. C. Levsen, A. Pierce, G. J. 2018 https://curis.ku.dk/portal/da/publications/infection-levels-and-species-diversity-of-ascaridoid-nematodes-in-atlantic-cod-gadus-morhua-are-correlated-with-geographic-area-and-fish-size(20623cec-31b1-4d5b-a6e1-5c58dd0a2ab2).html https://doi.org/10.1016/j.fishres.2017.06.006 eng eng info:eu-repo/semantics/closedAccess Gay , M , Bao , M , MacKenzie , K , Pascual , S , Buchmann , K , Bourgau , O , Couvreur , C , Mattiucci , S , Paoletti , M , Hastie , L C , Levsen , A & Pierce , G J 2018 , ' Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size ' , Fisheries Research , vol. 202 , pp. 90-102 . https://doi.org/10.1016/j.fishres.2017.06.006 Anisakis Distribution in fillets Molecular identification Seafood safety Zoonotic nematodes article 2018 ftcopenhagenunip https://doi.org/10.1016/j.fishres.2017.06.006 2024-05-16T11:29:17Z Atlantic cod (Gadus morhua) is among the most important commercial fish species on the world market. Its infection by ascaridoid nematodes has long been known, Pseudoterranova even being named cod worm. In the present study, 755 individuals were sampled in the Barents, Baltic and North Seas during 2012-2014.Prevalences for Anisakis in whole fish and in fillets in the different fishing areas varied from 16 to 100% and from 12 to 90% respectively. Abundance was also greatly influenced by the sampling area. Generalized additive model results indicate higher numbers of Anisakis in the North Sea, even after the larger body size was accounted for. Numbers and prevalence of Anisakis were positively related to fish length or weight. The prevalence of parasites in whole fish and in fillets was also influenced by the season, with the spring displaying a peak for the prevalence in whole fish and, at the same time, a drop for the prevalence in fillets. Whereas 46% of cod had Anisakis larvae in their fillets, the majority (39%) had parasites mainly in the ventral part of the fillet and only 12% had parasites in their dorsal part. This observation is of importance for the processing of the fish. Indeed, the trimming of the ventral part of the cod fillet would allow the almost total elimination of ascaridoids except for cod from the Baltic Sea where there was no difference between the dorsal and the ventral part.The presence of other ascaridoid genera was also noticeable in some areas. For Pseudoterranova, the highest prevalence (45%) in whole fish was observed in the Northern North Sea, whereas the other areas had prevalences between 3 and 16%. Contracaecum was present in every commercial size cod sampled in the Baltic Sea with an intensity of up to 96 worms but no Contracaecum was isolated from the Central North Sea. Non-zoonotic Hysterothylacium was absent from the Baltic Sea but with a prevalence of 83% in the Barents and the Northern North Sea.A subsample of worms was identified with genetic-molecular tools and assigned ... Article in Journal/Newspaper atlantic cod Gadus morhua University of Copenhagen: Research Fisheries Research 202 90 102 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Anisakis Distribution in fillets Molecular identification Seafood safety Zoonotic nematodes |
spellingShingle |
Anisakis Distribution in fillets Molecular identification Seafood safety Zoonotic nematodes Gay, M. Bao, M. MacKenzie, K. Pascual, S. Buchmann, K. Bourgau, O. Couvreur, C. Mattiucci, S. Paoletti, M. Hastie, L. C. Levsen, A. Pierce, G. J. Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size |
topic_facet |
Anisakis Distribution in fillets Molecular identification Seafood safety Zoonotic nematodes |
description |
Atlantic cod (Gadus morhua) is among the most important commercial fish species on the world market. Its infection by ascaridoid nematodes has long been known, Pseudoterranova even being named cod worm. In the present study, 755 individuals were sampled in the Barents, Baltic and North Seas during 2012-2014.Prevalences for Anisakis in whole fish and in fillets in the different fishing areas varied from 16 to 100% and from 12 to 90% respectively. Abundance was also greatly influenced by the sampling area. Generalized additive model results indicate higher numbers of Anisakis in the North Sea, even after the larger body size was accounted for. Numbers and prevalence of Anisakis were positively related to fish length or weight. The prevalence of parasites in whole fish and in fillets was also influenced by the season, with the spring displaying a peak for the prevalence in whole fish and, at the same time, a drop for the prevalence in fillets. Whereas 46% of cod had Anisakis larvae in their fillets, the majority (39%) had parasites mainly in the ventral part of the fillet and only 12% had parasites in their dorsal part. This observation is of importance for the processing of the fish. Indeed, the trimming of the ventral part of the cod fillet would allow the almost total elimination of ascaridoids except for cod from the Baltic Sea where there was no difference between the dorsal and the ventral part.The presence of other ascaridoid genera was also noticeable in some areas. For Pseudoterranova, the highest prevalence (45%) in whole fish was observed in the Northern North Sea, whereas the other areas had prevalences between 3 and 16%. Contracaecum was present in every commercial size cod sampled in the Baltic Sea with an intensity of up to 96 worms but no Contracaecum was isolated from the Central North Sea. Non-zoonotic Hysterothylacium was absent from the Baltic Sea but with a prevalence of 83% in the Barents and the Northern North Sea.A subsample of worms was identified with genetic-molecular tools and assigned ... |
format |
Article in Journal/Newspaper |
author |
Gay, M. Bao, M. MacKenzie, K. Pascual, S. Buchmann, K. Bourgau, O. Couvreur, C. Mattiucci, S. Paoletti, M. Hastie, L. C. Levsen, A. Pierce, G. J. |
author_facet |
Gay, M. Bao, M. MacKenzie, K. Pascual, S. Buchmann, K. Bourgau, O. Couvreur, C. Mattiucci, S. Paoletti, M. Hastie, L. C. Levsen, A. Pierce, G. J. |
author_sort |
Gay, M. |
title |
Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size |
title_short |
Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size |
title_full |
Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size |
title_fullStr |
Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size |
title_full_unstemmed |
Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size |
title_sort |
infection levels and species diversity of ascaridoid nematodes in atlantic cod, gadus morhua, are correlated with geographic area and fish size |
publishDate |
2018 |
url |
https://curis.ku.dk/portal/da/publications/infection-levels-and-species-diversity-of-ascaridoid-nematodes-in-atlantic-cod-gadus-morhua-are-correlated-with-geographic-area-and-fish-size(20623cec-31b1-4d5b-a6e1-5c58dd0a2ab2).html https://doi.org/10.1016/j.fishres.2017.06.006 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Gay , M , Bao , M , MacKenzie , K , Pascual , S , Buchmann , K , Bourgau , O , Couvreur , C , Mattiucci , S , Paoletti , M , Hastie , L C , Levsen , A & Pierce , G J 2018 , ' Infection levels and species diversity of ascaridoid nematodes in Atlantic cod, Gadus morhua, are correlated with geographic area and fish size ' , Fisheries Research , vol. 202 , pp. 90-102 . https://doi.org/10.1016/j.fishres.2017.06.006 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.fishres.2017.06.006 |
container_title |
Fisheries Research |
container_volume |
202 |
container_start_page |
90 |
op_container_end_page |
102 |
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1801373434691715072 |